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S7 314 IFM

Hardware and Installation

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Contents Quick Guide

Product overview Configuring Installation

Wiring Addressing Commissioning

Maintenance Testing functions, Diagnostics and FaultElimination

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Selecting and arranging

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Installation How to successfully install a SIMATIC

S7 system?

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Product overview S7-300 Configuration

Power supply (PS)

CPU

Signal modules (SM)

Function modules (FM)

Communication processors (CP)

Multiple S7-300 CPUs can communicate with each otherand with SIMATIC S7 PLCs across PROFIBUS cable.

You require a programming device (PG) to program theS7-300 PLC. Interconnect the PG and the CPU with aPG cable.

The next figure shows you a possible configuration,consisting of two S7-300 PLCs.

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S7-300 PLCs can be installed horizontally

or vertically. The following ambient airtemperatures are permissible:

horizontal installation: from 0 C to 60 C

vertical installation: from 0 C to 40 C

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S7-300 modules

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Configuring

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Configuring how to configure your mechanical

assembly, how to configure your electrical assembly,

what you need to consider for networking.

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Component dimensions Length of the profile

rails

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Installation dimensions of

modules

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Shielding terminal module

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Clearance

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Arranging modules on a single

module rack

Arranging modules on a single module

rackNo more than eight modules (SM, FM, CP) may be

installed to the right side of the CPU.

The total current load on the S7 backplane bus ofall modules mounted on a single module rack mustnot exceed

1.2 A (except with CPU 312C or CPU 312 IFM)

0.8 A with CPU 312C or CPU 312 IFM

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Arranging modules on multiple

module racks

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S7-300 installation with

grounded reference potential

Connection block diagram

The figure below shows an S7-300 assembly withCPU 313, 314, 314 IFM, 315, 315-2 DP, 316-2 DP,318-2 DP and grounded reference potential. If youwant to ground reference potential, you must notremove the bridge on the CPU between the Mterminal and functional ground.

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Isolated or non-isolated

modules? Application

Use isolated modules for: All AC load circuits

DC load circuits with separate reference potential

Examples: DC load circuits whose sensors have different reference

potentials (for example if grounded sensors are located atsome considerable distance from the control system and noequipotential bonding is possible)

DC load circuits with grounded positive pole (L+) (batterycircuits).

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Configuration with isolated modules

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Non-isolated modules

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Grounding

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Selecting the load power supply

unit Characteristics of load power supplies

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S7-300 with load power supply

from PS 307

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Network samples

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Maximum distances in the MPI

subnet

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PROFIBUS subnet

CPU 314C 2 DP MPI d

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CPU 314C-2 DP as MPI and

PROFIBUS node

PG t k

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PG access across network

boundaries (routing)

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Installation

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Installing the profile rail

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Installing modules on the profile

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Installing modules on the profile

rail

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Wiring

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Wiring

Bonding the protective

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Bonding the protective

conductor to the profile rail

Adjusting the power supply

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Adjusting the power supply

module to mains voltage

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PS and CPU wiring

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Wiring front connectors

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Inserting front connectors into

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Inserting front connectors into

modules

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Addressing

Slot-defined addressing of

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Slot defined addressing of

modules In slot-based addressing (default addressing), a

module start address is allocated to each slotnumber This is a digital or analog address,depending on the type of module. This sectionshows you which module start address is

assigned to which slot number. You need thisinformation to determine the start addresses ofthe installed modules.

Note With CPU 314 IFM and CPUs 31xC you cannot insert amodule in module rack 3, slot number 11. The address areais reserved for the integrated I/O.

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User-defined addressing of

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g

modules User-defined addressing is only supported

by CPUs 315, 315-2 DP, 316-2 DP and318-2 DP, as well as CPUs 31xC.

Advantages of user-defined

addressing:Optimization of the address areas available, since

"address gaps" will not occur between themodules.

When creating standard software, you canprogram addresses which are independent of therespective S7-300 configuration.

Addressing signal modules

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Addressing signal modules

Addresses of digital modules

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Addresses of digital modules

The address of an input or output of a digitalmodule consists of a byte address and a bitaddress.

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The byte address depends on the module

start address. The bit address is the number printed on

the module.

If the first digital module is inserted in slot4 its default start address is 0.The start

address of any further digital modules isincremented by 4 per slot

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Addresses of the analog

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modules The address of an analog input or output

channel is always a word address.

The channel address depends on the modulestart address.

If the first digital module is inserted in slot 4 its

default start address is 256. The start address ofany further analog modules is incremented by16 per slot

An analog I/O module has the same startaddresses for its input and output channels.

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Addressing the integrated I/O of

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the CPU CPU 314 IFM

Connecting the PG

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Connecting the PG

Connecting a PG to an S7-300

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Connecting a PG to an S7 300

Use bus connectors to connect a

stationary PG in the MPI subnet to theother nodes of the MPI subnet.

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Connecting the PG to Several

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Nodes Use bus connectors to connect a

stationary PG in the MPI subnet to theother nodes of the MPI subnet.

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... ili ...

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... ili ...

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MPI addresses for service PGs

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If there is no stationary PG, we recommend:

To connect it to an MPI subnet with "unknown" nodeaddresses, set the following addresses on the servicePG:

MPI address: 0

Highest MPI address: 126.

Using STEP 7, you then determine the highestMPI address in the MPI subnet and adapt the

highest MPI address in the PG to that of the MPIsubnet.

Maintenance

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Removing a module (SM/FM/CP)

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g ( )

Removing the front connector

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coding pin from the module

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Installing a new module

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Surge protection circuit for

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networked S7-300 PLCs

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Overvoltage Protection

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The figure below shows an output circuit thatrequires additional surge arresters.

Circuit for coils operated with DC

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voltage

Circuit for coils operated with AC

lt

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voltage